Year	sq. km
1961	5483173.727
1962	5483153.727
1963	5483163.727
1964	5483163.727
1965	5483153.727
1966	5483143.727
1967	5483133.727
1968	5483123.727
1969	5483123.727
1970	5483113.727
1971	5483103.727
1972	5483103.727
1973	5483103.727
1974	5483073.727
1975	5482953.727
1976	5482873.727
1977	5482853.727
1978	5482853.727
1979	5482814.437
1980	5482734.437
1981	5482714.437
1982	5482704.437
1983	5482664.437
1984	5482674.517
1985	5482674.597
1986	5482674.677
1987	5482674.757
1988	5482664.837
1989	5481674.917
1990	5481674.997
1991	5481785.0770000005
1992	27114827.156999998
1993	27236451.237
1994	27231617.316999998
1995	27228617.397
1996	27228272.180999998
1997	27297611.963999998
1998	27300059.746
1999	27306847.527
2000	27344059.768
2001	27342569.547
2002	27341867.325999998
2003	27342375.104
2004	27342358.880999997
2005	27342279.656999998
2006	27438907.432
2007	27438749.207
2008	27437291.808999997
2009	27438179.811
2010	27439415.612
2011	27439247.812999997
2012	27439386.915
2013	27440674.775
2014	27440271.616
2015	27444550.257000003
2016	27444905.087
2017	27444169.807000004
2018	27444846.536
2019	27444670.142999995
2020	27440570.424000002
2021	27440754.487999998